Specifications

76
Start-up
• When using a three phase motor, check the direction of rotation of the
motor (see electrical connections start-up chap. page 71).
• Check the oil level (See page 68).
• Start-up the pump.
• Allow the pump to run for one hour with the inlet blocked at ultimate
vacuum:
During this operation, make sure that the oil circuit is operating. Remove one
of the oil fill plugs to listen to the pump.
At start-up, the oil enters the lubrication circuit of the vacuum pump. As a
result, noises will be heard (first irregularly, then regularly) which will reduce
as the oil heats up. These noises will no longer be heard when the fill plug
has been replaced.
Under normal temperature conditions, the oil circuit should start less than
1 minute after start-up (this time may vary with the type of oil and its degree
of contamination).
• Using the gas ballast:
- to decontaminate the pump’s oil;
- to accelerate heating. It is normal for the oil level to change (as can be seen
through the oil sight glass) when the pump is hot, due to expansion of the oil,
starting of the oil circuit and the operating conditions of the pump (inlet pres-
sure). If necessary, stop the pump and adjust the oil level between the "max"
and "min" levels on the sight glass.
In the event of a malfunction, refer to the "Troubleshooting and corrective
actions" table (page 84).